Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

37-660 Alignment Issue
#3

If I had to guess (and I do) Icon_wtf you are on the wrong peak. ie if the LO is to be at 6.53MHz when you tune 7Mhz, you have it peaked at 7.47 Mhz on the LO

turn the signal generator level down, and try to find a peak at 7MHz with the trimmer turned in tighter.

I would also assume the 1150 pF cap would be paper, you could try putting 2 .0022uF caps in series (1100pF) and see if the situation improves.

John
Las Vegas, NV USA


Messages In This Thread
37-660 Alignment Issue - by marv - 04-26-2012, 08:10 PM
RE: 37-660 Alignment Issue - by TA Forbes - 04-26-2012, 09:09 PM
RE: 37-660 Alignment Issue - by LASJayhawk - 04-27-2012, 01:04 AM
RE: 37-660 Alignment Issue - by marv - 05-09-2012, 03:37 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
91H Code 126 Restore
Well I'm making good progress. All the bakelite blocks have been recapped.  I found that using a heat gun and skinny ...RealRider — 02:35 PM
Philco model 60
>>and found that the field coil is bad. Should be 1140 ohms, tests at 1.1k ohms. You have one stringent crit...morzh — 02:07 PM
Philco model 60
Yes I was there. I got some real bargains there. Plus a Zenith 7G605 clipper that I have been trying to find for a fair ...Radios1340 — 01:46 PM
The speaker table error?
G  10-1/2"       65, 76, 87, 95 Push-Pull 45's 2766 0.7 550 3200 H   10-1/2"    77, 96 Push-Pull...morzh — 09:26 PM
A Marconi model 86
I have a Stromberg, one of the early ones, seems early 30s. This is what I call a back breaker. None of the early Philc...morzh — 08:28 PM
A Marconi model 86
A backbreaker.....PaulPaul Philco322 — 08:12 PM
A Marconi model 86
>>What a behemoth! A Juggernaut.morzh — 07:47 PM
Philco 70 antenna lead
I am not sure I understood about the coils and the mush. I looked an more than one coil in 20, 70, 90, 60, Zeniths and ...morzh — 07:46 PM
A Marconi model 86
:e_biggrin: What a behemoth!  I hope the final result is as much a quality sounding example!  Keep us posted on your pro...GarySP — 07:32 PM
A Marconi model 86
I should add that the double conversion may only be used on the shortwave bands, but I haven't looked at the schematic t...Arran — 07:27 PM

[-]
Who's Online
There are currently 6869 online users. [Complete List]
» 1 Member(s) | 6868 Guest(s)
Avatar

>